From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Reinecke Subject: [PATCH 08/14] blk-mq: add blk_mq_resize_tag_set() Date: Thu, 2 Jun 2016 16:39:10 +0200 Message-ID: <1464878356-42407-9-git-send-email-hare@suse.de> References: <1464878356-42407-1-git-send-email-hare@suse.de> Return-path: Received: from mx2.suse.de ([195.135.220.15]:54600 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932957AbcFBOjW (ORCPT ); Thu, 2 Jun 2016 10:39:22 -0400 In-Reply-To: <1464878356-42407-1-git-send-email-hare@suse.de> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: "Martin K. Petersen" Cc: Christoph Hellwig , James Bottomley , James Smart , Dick Kennedy , linux-scsi@vger.kernel.org, Hannes Reinecke , Hannes Reinecke Add a function to resize the number of tags in an existing tag set. Signed-off-by: Hannes Reinecke --- block/blk-mq.c | 15 +++++++++++++++ include/linux/blk-mq.h | 1 + 2 files changed, 16 insertions(+) diff --git a/block/blk-mq.c b/block/blk-mq.c index 29cbc1b..e2afe45 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2385,6 +2385,21 @@ void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues) } EXPORT_SYMBOL_GPL(blk_mq_update_nr_hw_queues); +int blk_mq_resize_tag_set(struct blk_mq_tag_set *set, int new_tags) +{ + int i, ret = 0; + + for (i = 0; i < set->nr_hw_queues; i++) { + if (!set->tags[i]) + continue; + ret = blk_mq_tag_update_depth(set->tags[i], new_tags); + if (ret) + break; + } + return ret; +} +EXPORT_SYMBOL(blk_mq_resize_tag_set); + void blk_mq_disable_hotplug(void) { mutex_lock(&all_q_mutex); diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 2498fdf..8b603b6 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -181,6 +181,7 @@ void blk_mq_unregister_disk(struct gendisk *); int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set); void blk_mq_free_tag_set(struct blk_mq_tag_set *set); +int blk_mq_resize_tag_set(struct blk_mq_tag_set *set, int new_tags); void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule); -- 1.8.5.6